Project Overview
VIRA is a low-cost, offline, one-touch wearable emergency alert system designed for women in disaster environments, ensuring quick, discreet communication without relying on internet or mobile networks.
Alerts are sent via LoRa, received by base units, and optionally forwarded to a web dashboard. Real-time vibration and LED feedback provide reassurance to the user.
Prototype Hardware
Mobile App UI
VIRA System Architecture
1. Wearable Device
ESP32 + LoRa Module with 2 SOS buttons (e.g., medical, safety), LED indicators, LoRa communication.
2. LoRa Mesh Network
LoRa Relays or Gateways (ESP32/Heltec devices) forward messages locally or to cloud.
3. Cloud Backend (Optional)
Firebase Realtime Database logs alerts, manages volunteers, stocks, and provides notifications.
4. Mobile/Web Dashboard
Flutter app/web shows real-time alerts, volunteer directory, emergency contacts, and stocks.
How VIRA Works
1. User Initiates Alert
User presses a tactile button on the wearable device, corresponding to a specific emergency type (e.g., medical, food, safety).
2. Data Packaging & Transmission
ESP32 reads the button input, packages the alert with Device ID, Alert Type, Timestamp, and transmits via LoRa.
3. Alert Reception (Base Unit)
Nearby LoRa-enabled base unit receives the alert, processes it, and triggers the next action.
4. ACK & Optional Cloud Forwarding
Base unit sends ACK back to wearable, logs alert, and optionally forwards to cloud/mobile dashboard.
5. User Confirmation
Wearable confirms alert delivery with vibration and/or LED to reassure the user.
Key Features
Offline First
Operates without internet or mobile networks, ideal for disaster-hit or remote regions.
One-Touch Alerts
Dedicated tactile buttons for medical, food, or safety emergencies for quick response.
LoRa Communication
Long-range, ultra-low power wireless transmission extending communication reach significantly.
Real-Time Acknowledgment
Instant vibration/LED feedback to confirm alert reception, reducing user anxiety.
Gender-Sensitive Design
Prioritizes women’s safety with discreet communication tools tailored to their needs.
Scalable System
Expandable from small setups to large mesh networks supporting thousands of users.